I went to have dinner and I left my PC on. When I came back, my computer was off and I couldn't turn it back on. The next day I bought a new PSU and the computer worked...UNTIL I put my GTX 1080 FTW back in. When the 1080 is in, the LEDs flash for a second and then the computer won't turn on. I tested my old PSU and it still works. I tried the 1080 in both slots and I even switched between master and slave mode. Nothing. I've had a 1080 FTW since release with no issues until now. 
 
So can anybody please help? Do you know anything about this? 
 
 

Try the 970 in your rig, and I would also have your friend try the 1080 in his - if he's willing.  Then you would know for sure if its the card or not.

hapkiman
Try the 970 in your rig, and I would also have your friend try the 1080 in his - if he's willing.  Then you would know for sure if its the card or not.

Yup I just did and my computer works with his 970 but his computer won't with my 1080. When the 1080 is in, the LEDs flash once and then the computer won't turn on. It's like it activates a surge protector or something. So it's definitely my GPU.
 
Any solutions or do I need to send it back to EVGA?

how many watts is the PSU?
 
edit: nvm i saw it on your sig
 
 

Bios up to date? 

Sounds like one or more of the VRM's has shorted out causing your power supply to shutdown (ie. crowbar) due to high current.  Most power supplies these days have over-current protection, you should NOT install the card in any other machines, RMA it back to EVGA.
 
** Edit **
Crowbar circuits are for over voltage protection and usually included in most power supplies as well.  In both cases you usually have to remove the AC mains either by shutting off a physical switch or disconnecting the power cord in order to reset the circuit.  
 

RMA time.

IchigoSoulReaper

hapkiman
Try the 970 in your rig, and I would also have your friend try the 1080 in his - if he's willing.  Then you would know for sure if its the card or not.

Yup I just did and my computer works with his 970 but his computer won't with my 1080. When the 1080 is in, the LEDs flash once and then the computer won't turn on. It's like it activates a surge protector or something. So it's definitely my GPU.
 
Any solutions or do I need to send it back to EVGA?

Time for an RMA. You tested it in a different computer and had the same error. Your system functions with a known good GPU. Just cite this thread when you request an RMA. Personally, If you can, I'd do it by phone. It's quicker and they are there 24/7.
 

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nautics889
Bios up to date? :/

Yeah man

gahelm
Sounds like one or more of the VRM's has shorted out causing your power supply to shutdown (ie. crowbar) due to high current.  Most power supplies these days have over-current protection, you should NOT install the card in any other machines, RMA it back to EVGA.
 
** Edit **
Crowbar circuits are for over voltage protection and usually included in most power supplies as well.  In both cases you usually have to remove the AC mains either by shutting off a physical switch or disconnecting the power cord in order to reset the circuit.  
 

That's exactly what's happening. Thanks for the explanation.
 
You guys are probably right...time for the RMA. I'll post back here to update people in case they're curious to see how EVGA handles the situation. 
 
 
EDIT: Update - http://forums.evga.com/Ne...formance-m2584626.aspx